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n. 1 (context biochemistry genetics organic compound uncountable English) A nucleoside derived from adenine and ribose, found in striated muscle tissue. 2 (context countable chemistry English) An instance of '''adenosine'''.


n. (biochemistry) a nucleoside that is a structural component of nucleic acids; it is present in all living cells in a combined form as a constituent of DNA and RNA and ADP and ATP and AMP


Adenosine is a purine nucleoside composed of a molecule of adenine attached to a ribose sugar molecule ( ribofuranose) moiety via a β-N- glycosidic bond. Adenosine is widely found in nature and plays an important role in biochemical processes, such as energy transfer — as adenosine triphosphate (ATP) and adenosine diphosphate (ADP) — as well as in signal transduction as cyclic adenosine monophosphate (cAMP). It is also a neuromodulator, believed to play a role in promoting sleep and suppressing arousal. Adenosine also plays a role in regulation of blood flow to various organs through vasodilation.

In addition to adenosine's endogenous forms, it is also used as a medication, specifically, as an antiarrhythmic agent, to treat a number of forms of supraventricular tachycardia that do not improve with vagal maneuvers. Common side effects include chest pain, feeling faint, shortness of breath along with tingling of the senses . Serious side effects include a worsening dysrhythmia and low blood pressure. It appears to be safe in pregnancy.

Usage examples of "adenosine".

Virtually all the food and oxygen you take into your body are delivered, after processing, to the mitochondria, where they are converted into a molecule called adenosine triphosphate, or ATP.

Her metabolic enhancer kicked in, flooding her body with extra adrenaline and inducing extra adenosine triphosphate.

Virtually all the food and oxygen you take into your body are delivered, after processing, to the mitochondria, where they are converted into a molecule called adenosine triphosphate, or ATP.

Acetyl-choline, adenosine triphosphate, adrenaline, a whole alphabet of brain chemicals.

A combination of two enzymes -- ethylene disulphonate and adenosine triphosphate, which, when injected together, improve carbohydrate metabolism in nervous tissue -- may also turn out to be effective.

ATP, adenosine triphosphate, was a molecule that provided energy for most metabolic processes.

I learned, was increased above the other nucleotides, hence more adenosine triphosphate and hence higher energy conversion in the phosphate group.

All it really says is that the level of adenosine triphosphate was depressed, and one precursor for that would be a physical struggle.

For a disease called severe combined immunodeficiency, SCIDS, the body wasn't producing a protein called adenosine deaminase (ADA).

It was only the light—violet-blue and orange-red—that mattered, the incredible shower of photons that excited her chlorophyll, passing electrons down carrier molecules to form adenosine diphosphate and nicotinamide adenine dinucleo .

The microvoltage of the phosphorylation of adenosine diphosphate to adenosine triphosphate in the cells' chlorophyll tingles his fingersensors when he feels for it.

Never in your life will you have to remind a cell to keep an eye on its adenosine triphosphate levels or to find a place for the extra squirt of folic acid that’.

I made the ship the electric duplicate of a D-glucose molecule and hoped the cell would do the normal thing and interact with a molecule of ATP -- adenosine triphosphate.

Much of it is initially employed to synthesize one of biochemistry's key modules, adenosine triphosphate (universally abbreviated by biochemists to ATP).

But if one were to electrically stimulate the perforant pathway to the hippocampus, and get a great deal of adenosine triphosphate past the blood-brain barrier, for instance, thus stimulating the long-term potentiation that aided learning in the first place.